Structural properties, such as surface area, pore size and density, of battery components can be characterised using a variety of different techniques.
Examples of gas sorption, mercury intrusion, and capillary flow porometry for anode, cathode, and separator materials, among others, are discussed in this application note.
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Radio wave weapon knocks out drone swarms
I hope they have assessed how easy it is to shield a drone against the attack. Hopefully the shielding would add too much weight.